Data Preprocessing

The major tasks in data preprocessing include data cleaning, data integration, data reduction, data transformation, and data discretization.

Data preprocessing refers to the cleaning, transforming, and integrating of data in order to make it ready for analysis. It is an important step in the data mining process as it improves the quality of data and makes it more suitable for specific data mining tasks.

The purpose of data cleaning is to 'clean' the information by filling in missing values, smoothing noisy information, identifying or eliminating outliers, and resolving deviations. It ensures that the data is of good quality and reliable for analysis.

<p>Dealing with incomplete or noisy data is important in the data mining process because dirty data can lead to unreliable results and confusion during the mining phase. It can also result in unstable output, making it difficult to draw accurate insights or make informed decisions.</p> Signup and view all the answers

<p>If users do not trust the results of data mining due to dirty data, it can undermine the credibility and effectiveness of data mining techniques. Users may disregard or overlook valuable insights and patterns, which can hinder decision-making processes and limit the potential benefits of data mining.</p> Signup and view all the answers